0.2.1 - agsjoy includes OSX build

agsjoy now checks if AGS itself or through plugin has already initialised SDL!

Note for Windows version: you need to include SDL2.dll in the same folder as agsjoy.dll .

Only 1 joystick is supported. Unsupported functions right now:

joy.DisableEvents()
joy.EnableEvents()
joy.Update()
joy.IsJoyBtnDown()
joy.Close()
joy.IsOpen

This release is built for compatibility with AGS ACI version 3.4.1.x